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Objective:To explore mediating effect of resilience between coping styles and obsessive-compulsive tendencies of college students.Methods:A total of 999 college students were selected by cluster sampling method and evaluated with Padua inventory(PI), Connor-Davidson resilience scale(CD-RISC) and coping style questionnaire(CSQ). Then SPSS 22.0 was used to analyze the date, and Mplus 7.4 was used to conduct structural equation modeling and Bootstrap mediated effect test.Results:The scores of the variables were as follows: the mature coping style(15.32±4.19), immature coping style(12.85±5.33), rationalizing coping(4.51±1.91), obsessive-compulsive tendencies(30.91±17.46), resilience(53.27±12.88). The mature coping style and resilience had significantly negative correlations with obsessive-compulsive tendencies( r=-0.21, -0.21; both P<0.01), immature coping style and rationalizing coping had significantly positive correlations with obsessive-compulsive tendencies( r=0.49, 0.29; both P<0.01). Resilience played a complete mediation role between mature coping style and obsessive-compulsive tendencies(-0.060, 95% CI: -0.117--0.005), and played a partial mediation between immature coping style and obsessive-compulsive tendencies(0.011, 95% CI: 0.001-0.027). Conclusion:Mature coping style negatively predict obsessive-compulsive tendencies through resilience, while immature coping style positively predict obsessive-compulsive tendencies through resilience.
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Objective To establish a rat model of spinal root avulsion and to validate the model by brain-derived neurotrophic factor(BDNF)treatment. Methods To evaluate the motor neuron loss,5 male SD rats were used to undergo spinal root avulsion surgery. One week later, the number of motor neurons in the ventral horn of the spinal cord was as-sessed by histopathology using immunohistochemical staining with a choline acetyl transferase(ChAT)antibody. After this pilot study,40 male SD rats at 7 weeks of age were randomly divided into 4 groups:two control groups,BDNF preventive and treatment groups. Results All rats recovered well post-surgery and no obvious abnormality was observed. Compared with the contralateral side,the number of motor neurons in the ipsilateral avulsed side was significantly decreased at one week after surgery(20.06%,P<0.05). Compared with the control group,there was a significant increase in ChAT posi-tive neurons in the BDNF preventive group(17.85% vs. 93.06%,P<0.0001)or BDNF treatment group(1week after surgery)(26.94% vs. 86.87%, P<0.0001), indicating that the motor neurons were effectively protected by BDNF. Conclusions A rat model of spinal root avulsion is successfully established,which can be valuable for studies of amyotro-phic lateral sclerosis and drug discovery efforts.
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Objective: To investigate the effects of the active ingredients combined therapy on inflammatory factors interleukin 1 beta (IL-1β) and neuropeptide Y (NPY) based onpharmacodynamics in rats. Methods: The animal model was built by transient middle cerebral artery occlusion (MCAO). The method for evaluating the concentrations of the FA-Pr-Al components in rat plasma was established by using HPLC and the expression levels of IL-1βand NPY were determined by ELISA. A new mathematics method of the trend of percentage rate of change (PRC) was used to assess the correlation between pharmacokinetics (PK) and pharmacodynamics (PD). Results: FA-Pr-Al in combination reduced neurological deficits, decreased infarct volume and inhibited the expression levels of IL-1βand NPY (all P<0.05)compared with the model group. FA, Pr and Al all displayed two compartment open models in rats. Clockwise hysteresis loops were obtained by time-concentration-effect curves. IL-1βand NPY level changes in the plasma followed an opposite trend to the plasma concentration tendency after Cmax was reached. Astragaloside’s PRC value was significantly higher than those of FA and puerarin between 120 to 180 min. Conclusions: The pharmacokinetics of FA-Pr-Al in combination were closely related its pharmacodynamics in treating ischemia/reperfusion injury, and the components of FA-Pr-Al may have a synergistic pharmacological effect. Astragaloside may play a more pronounced role in regulating IL-1毬and NPY levels comparedwith puerarin or FA.
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As a vital component in an overall laboratory animal care and use program , development of a disaster plan plays a critical role for every research institution .Currently, most of domestic institutions would draw up an“emergency operation plan , EOP”, but ignoring a practicable “business continuity plan , BCP” in establishing a disaster plan.In this article, we will discusse about the definition of disaster , how to set up an EOP, and how to establish a thorough BCP , in order to show an integrated and professional disaster plan in laboratory animal care and use program .
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<p><b>OBJECTIVE</b>To study the effect of 3'-methoxy puerarin on cerebral ischemic glutamic acid, aspartic acid, taurine and gamma-aminobutyric acid inhibitory of rats and investigate the protective mechanisms of cerebral ischemia-reperfusion.</p><p><b>METHOD</b>Using middle cerebral artery occlusion rat model, to collect extracellular fluid in rat striatal amino acid neurotransmitters by brain microdialysis and HPLC techniques with fluorescence detection before and after 3'-methoxy puerarin treatment four kinds of amino acids changes.</p><p><b>RESULT</b>3'-methoxy puerarin reduced concentrations of excitatory amino acid (EAA) Asp and Glu, while Tau and GABA inhibitory amino acids were significantly reduced.</p><p><b>CONCLUSION</b>3'-methoxy puerarin reduce ischemia-induced brain EAA toxicity against EAA neurotoxicity, regulate the brain neurotransmitter amino acid content, improve the excitatory and inhibitory amino acid balance is one of the mechanisms that to improve and protect the important acute cerebral infarction in rat brain nuclei.</p>
Subject(s)
Animals , Female , Male , Rats , Brain Ischemia , Drug Therapy , Metabolism , Excitatory Amino Acids , Metabolism , Isoflavones , Therapeutic Uses , Rats, Sprague-Dawley , Reperfusion Injury , Drug Therapy , MetabolismABSTRACT
<p><b>OBJECTIVE</b>To observe the effect of 3'-methoxy puerarin on cerebral infarction volume and free radical change of focal cerebral ischemia-reperfusion injury in rats and discuss the protective effect of 3'-methoxy puerarin on the cerebral ischemic/ reperfusion injury.</p><p><b>METHOD</b>The thread method was used to induce middle cerebral artery embolization, to establish the focal cerebral ischemia-reperfusion model. Rats were divided into five groups: the sham and model group, the two-dose group (5, 10 mg x kg(-1) x d(-1)) of 3'-methoxy puerarin and nimodipine group (5 mg x kg(-1) x d(-1)). The behavior changes and volume of cerebral infarction were observed, and the leves of SOD and the content of MDA were measured.</p><p><b>RESULT</b>3'-methoxy puerarin could significantly improve the symptoms of neurological deficit and reduce the infarct volume, and increased SOD activity and reduced the content of MDA of cortex in cerebral ischemia-reperfusion injury rat, the action of 10 mg x kg(-1) of 3'-methoxy puerarin is more remarkable.</p><p><b>CONCLUSION</b>3'-methoxy puerarin has protective effect on focal cerebral ischemia-reperfusion injury in rat.</p>